Lock.



o. SGHOENFELD.

LOCK.

-APPLICATION FILED MAY Z0, 1912. l 1,062,302, Patented May 20, 1913.

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APPLIoATIoN HLED MAY zo, 1912.

Patented May 20, 1913.

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LOCK.

APPLICATION FILED MAY Z0, 1912.

1,062,302- v Patented May 20, 1913.

3 SHEETS-SHEET 3- Seizoen/f CHARLES SCHOENFELD, OF CANTON, OHIO. l

LOCK.

Specicaton of Letters Patent.

Patented May 20, 1913.

Application filed. May 20, 1912. Serial No. 698,369.

To all whom it may concern:

Be it known that I, CHARLEs SeHonNFELD,

a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a certain new and useful Lock, of which the following is a specication.

My invention relates to improvements in locks and more especially to that class of locks used upon the doors of jail or prison cells and the like and has for its object to provide a lock of the class mentioned in which the bolt is held in positive locked position by the action of a sliding locking bar upon the tumblers.

A further object is to provide alock of the class mentioned which may be closed and locked without the use of a key, making what is known as a. spring lock.

A still further object is to provide such a lock which when once locked can only be opened by the use of the proper key.

These objects, together with other objects readily apparent to those skilled in the art, I attain by the construction illustrated in the accompanying drawings, although my invention may be embodied in a variety of other mechanical forms, the construction illustrated being chosen by way of example.

Figure 1 is a plan view of my improved lock showing the parts thereof in normal position, the to-p plate being broken away for purpose of illustration. Fig. 2 is a similar view showing the several parts of the lock in the relative positions they assume as the door` is being closed. Fig. 3 is a similar view showing the several parts of the lock in locked position, the top plate being completely removed. Fig. 4 is an end `view of the lock. Fig. 5 is a section on the line 5-5 of Fig. 1. Fig. 6 is a detailed perspective view of the locking bolt. Fig. 7 is a detailed perspective view of the sliding locking bar. Fig. 8 is a fragmentary view of a portion of the lock showing the indicator. x

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings.

The casing 1 isof the usual form and may be provided with screw threaded apertures 2 to accommodate the screws 3 for attaching the top plate 4 thereto. The locking bolt 5 is preferably provided with the enlarged head 6, said head having the beveled outer face 7, adapted to project into the keeper when in the locked position. The bolt 5 is preferably located intermediate a series of tumblers 8, which tumblers are pivoted upon the post 9, said post extending through the slot 10 located in the rear portion of the bolt 5. The tumblers 8 are provided with the slots 11 in their forward ends, said slots adapted to receive the stud 12 carried by the bolt 5. The forward edge 13 of each tumbler is formed in an arc having its oenvter at the post 9. A spring 14 is connected to the casing at 15 and tothe bolt 5 at 16 and normally holds said bolt in the posit-ion shown in Fig. 1 of the drawings. Each tumbler 8 is provided with a spring 17 which tends to throw the tumbler into the position shown in Fig. 3.

Thetail 18 of each tumbler bears against the post 19 upon the lever 20, said lever being pivoted intermediate its ends upon the post 21. To the upper extremity of the lever 2() as at 22 isy pivoted the link 23 which is pivotally connected as at 24 to the sliding locking bar 25. The bar 25 is provided at its rear end with the longitudinal aperture 26 adapted to accommodate the spring 27 and post 28, said post being pro vided with a shoulder 29 against which the vspring 27 bears, normally holding the bar 25 in the position shown in Fig. 1 of the drawings. The bar 25 passes through the slot 30 in the forward end of the casing 1 and is provided with the beveled forward face 81. A stop pin 82 is provided upon the lower face of the bar 25 and adapted to contact with the forward end of the casing 1 to prevent the bar 25 from being projected farther than the position shown in Fig. 1. The bracket 83 is located near the rear end of the bar 25 and is provided with a slot 84 adapted to accommodate saidbar. The Vkey hole 35 is provided in the casing beneath the concave faces 36 in the lower edges of the tumblers 8, the web of the key being adapted to pass around the concave faces 36 of the tumblers and to cont-act with the shoulder 37 upon the bolt 5.

As a safeguard against the lock `being tampered with from the inside an indicator is provided by means of which the jailer at a glance from the outside can readily see whether the bolt is shot forward. This indicator consists of the arm 38 pivoted at 89 to the top plate 4 of the casing. The upper end of said indicator rests against the shoulder 40 upon the bolt 5 and a pointer 41 is provided near said upper end. A spring 42 is connected to the arm 38 at 43 and to the plate 4 at 44 and holds said arm always against the shoulder 40. A curved slot 45 is provided in the plate 4 to accommodate the pointer 41. Vhen the several parts of the lock are in locked position as shown in Fig. 3 or in the normal position as shown in Fig. 1, that is to say whenever the bolt 5 is extended out of the lock to its limit, the pin 41 will assume the position in the slot 45 as shown in Fig. 8. Vhen the bolt is pushed back as shown in Fig. 2 the pin 41 will be carried back toward the opposite end of the slot 45. As a further guard against tampering with the lock the shoulders 46 may be provided in some or all of the tumblers 8. Now assuming that the parts of the lock are in locked position as shown in Fig. 3; if a tool is inserted from the inside of the lock to force the tumblers up and push the bolt back into unlocked position, as soon as the tumblers are raised to a suflicient distance to allow the stud 12 to enter the slots 11 the inclined faces 47 in the slots 11 will ride down over the stud 12 by means of the springs 17 and said stud will come in contact with the shoulders 46, thereby preventing the bolt from being moved farther back.

rlhe operation of the device is as follows: The several parts of the lock are normally in the position shown in Fig. 1 when the door is open and as the door is closed the inclined faces 7 of the bolt'head 6 will come in contact with the door frame forcing the bolt back. The stud 12 upon the bolt 5 will pass back into the slots 11 in the tumblers S; As the bolt head 6 is set in advance of the bar 25 the bolt will be moved completely back before the beveled face 31 of the bar 25 comes in contact with the door frame. When said face does contact with the door frame the bar 25 is moved backward carrying with it the link 23 and thereby swinging the lever 20 upon the post 21 and bringing the post 19 out of contact with the tails 18 of the tumblers. The several parts have then assumed the positions shown in Fig. 2 of the drawings. As the door is pushed farther back into its closed position the bolt head 6 will register with the keeper 48 and the spring 14 will throw said bolt head into the keeper, thereby drawing the stud 12 out of the slots 11 in the tumblers. The springs 17 willthen cause the tumblers to rotate upon the post 9 until the tails 18 of said tumblers contact with the post 19, at which time the edges 13 of the tumblers will bear against the stud 12 thereby preventing the bolt from being forced back. 'Ihe several parts of the lock are then in the positions shown in Fig. 3. In order to unlock the lock it is necessary to 'insert the proper key into the key hole 35 and turn the key in the usual manner. The

web of the key will contact with the lower x edges of the tumblers 8 and raise the same until the slots 11 therein register with the stud 12 when the web will contact with the shoulder 37 upon the bolt 5 thereby drawing said bolt back when the door may be opened.

As the lock bar 25 normally protrudes from the casing as shown in Fig. 1 of the drawings the lock cannot be tampered with by a prisoner when the door is open as is the case with the majority of such locks having a bolt release bar equivalent to the lock bar 25. In the ordinary locks of this character where the lock bar or release bar protrudes from the casing when the door is opened the prisoner may press said bar back into the casing thus setting the bolt in locked position so that if it is necessary to close a door quickly upon an unruly prisoner the bolt will contact with the door frame making it impossible to shut and lock the door. In the present construction any pressing of the bar 25 while the door is open will cause no movement of the other parts of the lock, the spring 27 merely beingk compressed upon such action. Upon releasing the pressure eX- erted upon the bar 25 said spring will throw it back into its normal position, thus leaving the lock always in readiness for the door to be instantly slammed and locked upon a prisoner.

I claim 1. In a lock of the character described, a casing, a bolt carried within said casing, a stud located upon said bolt, tumblers pivoted wit-hin said casing, said tumblers provided with slots adapted to register with' said stud, means for normally projecting. said bolt out of saidlcasing, means for limiting the movement of said bolt, springs connected to said tumblers and adapted to throw said Slots out of alinement with said stud, a spring pressed bar slidably mounted within said casing, the outer end of said bar being provided with a beveled face, means for limiting the movement of said bar and means connected to said bar and adapted to contact with said tumblers.

2. In a lock of the character described, a casing, a bolt carried by said casing, a stud located upon said bolt, tumblers pivoted within said casing, said tumblers provided with slots adapted to register with said stud, means for normally projecting said bolt out of said casing, means for limiting the movement of said bolt, springs connected to said tumblers and adapted to throw said slots out of alinement with said stud, a spring .pressed bar slidably mounted within said casing, the outer end of said bar being provided with a beveled face, means for limiting the movement of said bar, means connected to said bar and adapted to contact with said tumblers, and means for indicating when said bolt is in locked position.

3. In a lock of the character described, a

casing, a bolt carried Within said casing, a stud located upon said bolt, tumblers pvoted Within said casing, said tumblers provided With slots adapted to register with said stud, means for normally projecting said bolt out of said casing, means for limiting the movement of said bolt, springs connected to said tumblers and adapted to throvs7 said slots out of alinement With said stud, a spring pressed bar slidably mounted Within said casing, the outer end of said bar being provided With a beveled face, means for limiting the movement of said` bar, and means Connected to said bar and adapted to Contact with said tumblers, said'tumblers adapted to be raised to bring the slots into alinement With said stud and the bolt adapted to be Withdrawn by a single operation of a suitable key.

4L. In a look of the character described, a casing, a bolt carried Within said casing, said bolt provided With slots, a stud carried by the bolt adapted to register Withthe slots,

means for normally projecting said bolt out of said Casing, means for limiting the movement of said bolt, said bolt provided with a shoulder adapted to be engaged by a key, tumblers located upon either side of said bolt, said tumblers provided with concave edges adapted to Contact vvith the key, springs adapted to throvv said slots out of alinement with said stud, tails, provided upon said tumble-rs, a lever pivoted intermediate its ends to said casing, a post 1ooated at one end of said lever adapted to Contact with said tails, a link pivoted at the other end of said lever and a spring pressed bar pivoted to said link.

In testimony that I claim the above, I have hereunto subscribed my name inthe presence of tvvo Witnesses.

cHARLns sorionivrninn.v

Vitnesses:

JOHN H. BISHOP, SYLVIA BORON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

